我遇到了一个OSGi捆绑包的问题。 当我启动它时，我有以下错误：
ERROR: Bundle nsis-common-referentiel [457] Unable to get module class
path. (java.lang.NullPointerException) java.lang.NullPointerException
at org.apache.felix.framework.BundleRevisionImpl.calculateContentPath(BundleRevisionImpl.java:432)
at org.apache.felix.framework.BundleRevisionImpl.initializeContentPath(BundleRevisionImpl.java:365)
at org.apache.felix.framework.BundleRevisionImpl.getContentPath(BundleRevisionImpl.java:351)
at org.apache.felix.framework.BundleRevisionImpl.getResourcesLocal(BundleRevisionImpl.java:515)
at org.apache.felix.framework.BundleWiringImpl.findResourcesByDelegation(BundleWiringImpl.java:1190)
at org.apache.felix.framework.BundleWiringImpl.getResourcesByDelegation(BundleWiringImpl.java:1100)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.getResources(BundleWiringImpl.java:2576)
at org.hibernate.osgi.OsgiClassLoader.findResources(OsgiClassLoader.java:168)
at java.lang.ClassLoader.getResources(ClassLoader.java:1142)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl$AggregatedClassLoader.getResources(ClassLoaderServiceImpl.java:186)
at java.util.ServiceLoader$LazyIterator.hasNextService(ServiceLoader.java:348)
at java.util.ServiceLoader$LazyIterator.hasNext(ServiceLoader.java:393)
at java.util.ServiceLoader$1.hasNext(ServiceLoader.java:474)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.loadJavaServices(ClassLoaderServiceImpl.java:339)
at org.hibernate.integrator.internal.IntegratorServiceImpl.<init>(IntegratorServiceImpl.java:57)
at org.hibernate.boot.registry.BootstrapServiceRegistryBuilder.build(BootstrapServiceRegistryBuilder.java:247)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.buildBootstrapServiceRegistry(EntityManagerFactoryBuilderImpl.java:518)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:206)
at org.hibernate.jpa.boot.spi.Bootstrap.getEntityManagerFactoryBuilder(Bootstrap.java:51)
at org.hibernate.jpa.boot.spi.Bootstrap.getEntityManagerFactoryBuilder(Bootstrap.java:64)
at org.hibernate.osgi.OsgiPersistenceProvider.createContainerEntityManagerFactory(OsgiPersistenceProvider.java:112)
at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager.createEntityManagerFactories(EntityManagerFactoryManager.java:432)
at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager.registerEntityManagerFactories(EntityManagerFactoryManager.java:292)
at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager.access$000(EntityManagerFactoryManager.java:74)
at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager$1.call(EntityManagerFactoryManager.java:203)
at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager$1.call(EntityManagerFactoryManager.java:199)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
启动我的捆绑包没有阻止，它是“活动”。但是当我尝试通过我的Java代码执行SQL命令时，它只适用于本机查询。当我尝试执行HQL查询/命名查询时，我总是遇到错误，例如
ClassCastException: com.example.MyBean cannot be cast to com.example.MyBean
我猜它与第一个错误相关联。你觉得怎么样？你知道如何防止第一次错误吗？
如果您需要更多信息，请不要犹豫。
非常感谢， Hejk